Santa Rosa to Portland

What the Data Says About STS to PDX

The Santa Rosa to Portland corridor (STS → PDX) covers roughly 489 miles and is served by 3 carriers, based on Bureau of Transportation Statistics reporting. Across 1,205 flights in the dataset, this route posts a 86.1% on-time rate with an average delay of 77.1 minutes when flights run late. Over the most recent 24 months of BTS data, 892 flights were recorded on this pairing — 7 cancelled (0.8%) and 1 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 3 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 1,205 total flights analyzed, the 86.1% on-time figure is statistically meaningful rather than a small-sample fluke. The 77.1-minute average delay applies only to flights that actually ran late, so it is not the average wait across all departures — the majority of flights on this route depart on time under the BTS definition of a delay (15+ minutes past schedule).

Looking at recent months, Sep 2025 posted the best performance on this corridor at 95% on-time, while May 2025 came in at 82% on-time — a 13-point gap between best and worst recent month. For travelers evaluating the STS to PDX route, the combination of a 86.1% on-time rate, 77.1-minute average delay, 0.8% recent cancellation rate, and 3 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.